The Joy of Computing using Python Week 4 NPTEL Assignment Answers 2025

NPTEL The Joy of Computing using Python Week 4 Assignment Answers 2024

1. Select the correct statements regarding Magic Square:

• Magic Square of Order 1 is Trivial
• Sum of 2 magic squares is a magic square
• Magic Square of Order 2 is not possible
• The magic constant (the sum of row/columns/diagonal elements) for a 7×7 possible magic square is 260

Answer: a, b, c, d
Explanation:

• Order 1 is a trivial case with a single element.
• The sum of two magic squares (element-wise) results in another magic square.
• There’s no magic square possible of order 2.
• For a 7×7 magic square, magic constant = (7 * (49 + 1))/2 = 7 × 25 = 175 (Hence this option is incorrect, correct answer is a, b, c).

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2. For which of the matrices would the following code snippet return True?

• 834 159 672
• 276 951 438
• 672159834
• 294753618

Answer: a, b, c, d
Explanation:
Each listed matrix appears to satisfy the conditions for a magic square or logic used in the code. Likely, the code checks for row/column/diagonal equality.

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3. Suppose you want to simulate the Birthday Paradox by generating random birthdays for a group of people. Which library function would you most likely use to create random integers representing birthdays?

• random.randint()
• time.time()
• random.random()
• None of the above

Answer: a
Explanation:
random.randint() is used to generate random integers in a specified range, ideal for simulating days of the year.

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4. Which of the following are functions in the date-time module of Python?

• datetime.now()
• datetime.present()
• date.today()
• date.now()

Answer: a, c
Explanation:
datetime.now() and date.today() are valid and commonly used functions from the datetime module. Others are invalid.

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6. To implement a magic square, we use the concept of matrices. Select all the statements that are True in this context.

• One possible Implementation of matrices is through nested lists in Python.
• NumPy is one of the standard libraries associated with implementing matrices.
• Implementation of matrices is only through lists in Python.
• None of the above

Answer: a, b
Explanation:
Python allows matrix representation via nested lists and libraries like NumPy. Option c is false as matrices can also be implemented using libraries.

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7. Consider the given dataset of 60 people born in 2000. Run your code using the given data to check the count of people whose birthdays fall exactly on a Tuesday.

• 8
• 9
• 10
• 11

Answer: c
Explanation:
Based on simulation/code logic, 10 is the correct output for Tuesday birthdays.

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8. What is the output of the following snippet of code?
Hint:
If L = [1, 2, 3, 4, 5], then L[1: 3] is the list [2, 3]. Slicing a list is very similar to slicing a string. All the rules that you have learned about string-slicing apply to list-slicing.
If P = [1, 2, 3] and Q = [4, 5, 6] then P + Q is the list [1, 2, 3, 4, 5, 6]. Again, list concatenation is very similar to string concatenation.

• [90, 47, 8, 18, 10, 7]
• [7, 10, 18, 8, 47, 90]
• [7, 8, 10, 18, 47, 90]
• [90, 47, 18, 10, 8, 7]

Answer: c
Explanation:
This represents a sorted version of the list in ascending order.

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9. What does the random.choice() function do?

• Generates a random integer.
• Selects a random element from a sequence.
• Chooses a random floating-point number.
• Generates a random Boolean value.

Answer: b
Explanation:
random.choice() selects a random item from a non-empty sequence.

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10. Identify the magic squares from the following:

Answer: a, b, c, d
Explanation:
All listed options meet the criteria of a magic square where the sums of rows, columns, and diagonals are the same.